1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 256Get this manual
IGNITION SYSTEM REVOLUTION RESEARCH LINE INSPECTION (After '87: FOREMAN)
Remove the right side coverDisconnect the revolution research wire (Y) connector from the alternator changing coilAnd also disconnect the regulatorrectifier 3P (Green) connectorMeasure the continuity between connector terminals on the following chart
(1) TO COl UN IT
+ (2) CONTINUITY
Regulatorrectifier 3P connector (Y) terminal Body ground
Revolution research wire (Y) CONTINUITY NO CONTINUITY
NO CONTI- () NUlTY